The belief in reincarnation, or the transmigration of the soul, was a central tenet of ancient Indian philosophy and religion, particularly in Hinduism and Buddhism.

Hades was the Greek god of the underworld, the realm of the dead. He was often depicted as a stern and unforgiving figure, and his name is often used to refer to the underworld itself.

The ancient Egyptian pyramids were primarily constructed as tombs for pharaohs, the rulers of ancient Egypt. They were designed to protect the pharaoh's body and possessions in the afterlife.

Ancestor worship, the belief that the spirits of deceased ancestors continue to exist and can influence the lives of the living, was a widespread practice in ancient China.

The Vedas are the oldest sacred texts of Hinduism, dating back to the 2nd millennium BCE. They consist of four collections of hymns, prayers, and philosophical discussions.

Mars was the Roman god of war, and his name is still used to refer to the planet Mars in astronomy.

The Dionysia was an ancient Greek festival that celebrated the god Dionysus, the god of wine, revelry, and theater. It was one of the most important festivals in the Athenian calendar.

Mummification was a complex process of preserving the body after death, practiced by the ancient Egyptians. It involved removing the internal organs, treating the body with preservatives, and wrapping it in linen bandages.

Confucius was an ancient Chinese philosopher who founded Confucianism, a system of ethical and political thought that emphasized social harmony, respect for elders, and personal cultivation.

Thor was the Norse god of thunder, strength, and protection. He was often depicted as a powerful warrior with a hammer named Mjölnir.

Human sacrifice was a common practice among the ancient Aztecs, who believed that it was necessary to appease the gods and ensure the continued functioning of the universe.

The Pythia was the oracle at the Temple of Apollo in Delphi, who delivered prophecies in a trance-like state. Her pronouncements were highly respected and influential in ancient Greece.

Sati was a practice in ancient India where widows were expected to immolate themselves on their husband's funeral pyre. It was seen as a way for the widow to join her husband in the afterlife.

Ra was the ancient Egyptian god of the sun, often depicted as a man with a falcon head and a solar disk above it. He was one of the most important gods in the Egyptian pantheon.

Geomancy was a practice in ancient China where diviners used patterns in the earth, such as cracks or mounds, to make predictions about the future.